Köln 2004 – scientific programme

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HK: Physik der Hadronen und Kerne

HK 47: Heavy Ions V

HK 47.8: Talk

Thursday, March 11, 2004, 18:45–19:00, E

Kinetic and Chemical Equilibration in a parton cascade including inelastic collisions — •Zhe Xu and Carsten Greiner* — Institut für Theoretische Physik, Universität Giessen, 35392 Giessen, Germany (* present address: Institut für Theoretische Physik, Universität Frankfurt, 60054 Frankfurt am Main, Germany)

We present a new 3+1 dimensional Monte Carlo algorithm solving the kinetic Boltzmann equation for partons including the inelastic gg ↔ ggg pQCD multiplication processes. The back reaction channel is treated for the first time fully consistently within this scheme. An extended stochastic method is used to solve the collision integral. Assuming multiple production of minijets in Au+Au collisions as initial space-time input, we study the kinetic and chemical equilibration at RHIC energy. It is demonstrated that thermalization is driven mainly by the inelastic processes on a timescale of less than 1 fm/c. We also discuss the consequence on parton thermalization when a color glass condensate is considered as the initial state of partonic matter. Again, we find a fast thermalization within the various local rapidity cells of the partonic phase.
Work supported by BMBF.